United States
                              Securities and Exchange Commission
                                    Washington, D.C. 20549


                                        SCHEDULE 13D

                          Under the Securities Exchange Act of 1934
                                      (Amendment No. 20)

                        John Hancock Patriot Premium Dividend Fund II
                                      (Name of Issuer)


                                         Common Stock
                               (Title of Class of Securities)


                                         41013T-10-5
                                       (CUSIP Number)



                                  The Commerce Group, Inc.
                                       211 Main Street
                                      Webster, MA 01570
                                       (508) 943-9000
                        (Name, Address and Telephone Number of Person
                      Authorized to Receive Notices and Communications)



                                        March 7, 2006
                  (Date of Event which Requires Filing of this Statement)


If the filing person has previously filed a statement on Schedule 13G to
report the acquisition that is the subject of this Schedule 13D, and is filing
this schedule because of Section 240. Rule 13d-1(e), 240.13d-1(f) or 240.13d-
1(g), check the following box:    [  ]

The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act.





















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CUSIP No.: 41013T-10-5                      THE COMMERCE GROUP, INC.
                                            SCHEDULE 13D
                                            AMENDMENT No. 20
                                            MARCH 17, 2006




1.       NAME OF REPORTING PERSON
         I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

            The Commerce Group Inc.
            ID# 04-2599931

2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                          (a) [  ]
                                                          (b) [  ]

3.       SEC USE ONLY

4.       SOURCE OF FUNDS                                      [WC]

5        CHECK BOX IF DISCLOSURE OF LEGAL                     [  ]
         PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)

6.       CITIZENSHIP OR PLACE OF ORGANIZATION

            Massachusetts

         NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

7.       SOLE VOTING POWER                             6,419,000
8.       SHARED VOTING POWER                                   0
9.       SOLE DISPOSITIVE POWER                        6,419,000
10.      SHARED DISPOSITIVE POWER                              0

11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

            6,419,000

12.      CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
         CERTAIN SHARES    [    ]

13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
            42.7%

14.      TYPE OF REPORTING PERSON
           [HC]



















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CUSIP No.: 41013T-10-5                      THE COMMERCE GROUP, INC.
                                            SCHEDULE 13D
                                            AMENDMENT No. 20
                                            MARCH 17, 2006


ITEM 1.  SECURITY AND ISSUER

     This Schedule 13D relates to the shares of beneficial interest (the
"Shares"), of John Hancock Patriot Premium Dividend Fund II (the "Fund"), a
Massachusetts business trust registered as an investment company under the
Investment Company Act of 1940, as amended (the "Investment Company Act").
The principal executive offices of the Fund are located at 601 Congress
Street, Boston, MA  02110.


ITEM 2.  IDENTITY AND BACKGROUND

     (a) - (f) This Schedule 13D is being filed by The Commerce Group Inc.
(the "Reporting Person"), a corporation formed under the laws of
Massachusetts.  The Reporting Person is a corporation whose principal offices
are located at 211 Main Street Webster, MA 01570.


ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

     The source of the funds used by the Reporting Person to purchase shares
listed in Item 5(a) was working capital.  This amount of the funds used to
purchase such shares reported in Annex A aggregated approximately $1,733,687.


ITEM 4.  PURPOSE OF TRANSACTION

     No material change has taken place since the previous filing.


ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER

     (a) The Fund's reports with the Securities and Exchange Commission report
that 15,046,539 Shares are outstanding.  Based upon such number, the Reporting
Person beneficially owns 42.7% of the Fund's outstanding Shares.

     (b) The Reporting Person is the beneficial owner (through its insurance
subsidiary as listed below) of 6,419,000 shares, over which it has sole power
of disposition and voting.  Such number of Shares represents approximately
42.7% of the outstanding Shares.


                                              Shares                Cost

   The Commerce Insurance Company            6,419,000         $70,428,966


     (c) During the period from February 1, 2006 through March 7, 2006, the
Reporting Person has effected the following purchases of common stock, all of
which were made on the New York Stock Exchange (see attached Annex A).  All
transactions prior to February 1, 2006 were reported on previous Schedule 13D
filings.

     (d) No person other than the Reporting Person has the right to receive or
the power to direct the receipt of dividends from, or the proceeds from the
sale of, the shares of Common Stock owned by the Reporting Person.

     (e) It is inapplicable to state the date on which the Reporting Person
ceased to be the beneficial owner of more than five percent of the Common
Stock.


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CUSIP No.: 41013T-10-5                      THE COMMERCE GROUP, INC.
                                            SCHEDULE 13D
                                            AMENDMENT No. 20
                                            MARCH 17, 2006




ITEM 6.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS
         WITH RESPECT TO SECURITIES OF THE ISSUER

     The Reporting Person does not have any contract, arrangement,
understanding or relationship (legal or otherwise) with any person with
respect to any securities of the Fund, including, but not limited to, the
transfer or voting of any such securities, finders' fees, joint ventures, loan
or option arrangements, puts or calls, guarantees of profits, division of
profits or loss, or the giving or withholding of proxies.



ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS

   Annex A   Item 5(c) Information





                                            SIGNATURE



After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and
correct.



MARCH 17, 2006                              THE COMMERCE GROUP INC.









                                          /s/ John M. Meciak
                                          John M. Meciak
                                          Assistant Treasurer








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                                                  ANNEX  A
                                         Item 5 (c) - Information
PDT   41013T-10-5    JOHN HANCOCK PATRIOT DIV FUND II



COMMERCE INSURANCE COMPANY
    PURCHASES

From 2/1/06 - 3/7/2006

  TRADE           SETTLEMENT         SHARES             PRICE         ACQUISITION
  DATE               DATE           PURCHASED        PER SHARE            COST
                                                                
  02/21/06        02/24/06          13,200           $11.53          $  152,618.40
  02/27/06        03/02/06           5,700            11.75              67,170.51
  02/08/06        02/13/06           3,800            11.14              42,458.16
  02/02/06        02/07/06           4,300            11.29              48,702.66
  02/06/06        02/09/06           5,000            11.27              56,525.00
  02/16/06        02/22/06           1,500            11.25              16,927.50
  02/09/06        02/14/06           2,600            11.10              28,951.00
  02/17/06        02/23/06          28,600            11.45             328,462.42
  02/14/06        02/17/06          11,500            11.24             129,660.20
  02/13/06        02/16/06           9,900            11.24             111,614.58
  02/10/06        02/15/06           5,100            11.20              57,292.38
  02/15/06        02/21/06           9,400            11.22             105,830.84
  02/22/06        02/27/06           1,700            11.55              19,694.50
  02/24/06        03/01/06           4,500            11.70              52,807.50
  02/28/06        03/03/06           7,300            11.75              86,015.17
  02/23/06        02/28/06           1,100            11.65              12,853.50
  03/01/06        03/06/06           2,000            11.77              23,600.00
  03/03/06        03/08/06           6,800            11.70              79,793.24
  03/06/06        03/09/06          14,700            11.70             172,489.80
  03/07/06        03/10/06          12,000            11.65             140,220.00

                                   150,700                           $1,733,687.36





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